Processing and Evaluation of Advanced Polymers and Molecular Composites

先进聚合物和分子复合材料的加工和评估

• 批准号: 9311741
• 负责人: Samson Jenekhe
• 金额: $ 24.55万
• 依托单位: University of Rochester
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-11-01 至 1998-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9311741&HistoricalAwards=false
• 关键词: Processing; Evaluation; Advanced; Polymers; Molecular

Abstract - Jenekhe Advanced polymers, such as aromatic polyimides, aromatic polyamides, polyquinolines, polybenzobisazoles, ladder polymers, and conjugated polymers, of interest for high-performance technological applications including engineering structures, aircraft, aerospace, and other transportation vehicles, electronics, photonics, and heat-resistant membranes for efficient separation processes, have rigid-chain structures and strong intermolecular interactions that make their processing and manufacturing into products or devices difficult and economically costly. The goal of this experimental research program is to develop new generic approaches for the processing and efficient manufacturing of advanced polymers and polymer-based composite materials into useful products produced by a range of industries. In previous experiments, the PI discovered a reversible Lewis acid coordination complexation chemistry of some rigid-chain polymers. Once the Lewis acid (e.g. AlCl3, FeCl3, or GaCl3) complexes of the rigid-chain polymers are formed, they readily dissolve in organic solvents to sufficiently high concentrations as to form liquid crystalline phases in solution. The polymer complexes also undergo a facile decomplexation when treated with water or alcohol, precipitating or regenerating the pure original polymers. This reversible Lewis acid-base complexation chemistry of heterocyclic rigid-chain polymers can be used as a basis of solution processing of different polymers to thin films, fibers, and coatings via conventional organic solvent processing techniques. The project's specific aims include: (1) determination of the fundamental processing characteristics of rigid-chain polymers and rigid-chain/flexible-chain molecular composites and development of the complexation mediated processing for producing films, coatings, fibers, or sheets from solutions, gels, or melts of coordination complexes of rigid-chain polymers; (2) exploration of the engineering problems associated with the processing of advanced polymers and polymer composites by developing the complexation mediated processing approach for commercial processing techniques such as spin coating, film extrusion, and fiber spinning; and (3) evaluation of the morphology and physical properties of films, coatings, fibers, and other forms produced by this processing approach and thereby elucidation of the effects of processing and morphology on the mechanical, electronic, optical, and optoelectronic properties of advanced polymers and polymer composites.

摘要- Jenekhe 高级聚合物，例如芳族聚酰亚胺、芳族聚酰胺、聚喹啉、聚苯并双唑、梯形聚合物和共轭聚合物，其对于高性能技术应用是有意义的，所述高性能技术应用包括工程结构、飞行器、航空航天和其它运输工具、电子学、光子学和用于有效分离过程的耐热膜，具有刚性链结构和强的分子间相互作用，这使得将它们加工和制造成产品或装置困难且经济上昂贵。 该实验研究计划的目标是开发新的通用方法，用于将先进聚合物和聚合物基复合材料加工和高效制造成由一系列行业生产的有用产品。 在以前的实验中，PI发现了一些刚性链聚合物的可逆刘易斯酸配位络合化学。 一旦形成刚性链聚合物的刘易斯酸（例如AlCl 3、FeCl 3或GaCl 3）络合物，它们就容易溶解在有机溶剂中至足够高的浓度，从而在溶液中形成液晶相。 当用水或醇处理时，聚合物络合物也经历容易的解络合，沉淀或再生纯的原始聚合物。 这种杂环刚性链聚合物的可逆刘易斯酸碱络合化学可用作通过常规有机溶剂加工技术将不同聚合物溶液加工成薄膜、纤维和涂层的基础。 该项目的具体目标包括：（1）确定刚性链聚合物和刚性链/柔性链分子复合材料的基本加工特性，并开发用于从刚性链聚合物的配位络合物的溶液、凝胶或熔体生产薄膜、涂层、纤维或片材的络合介导加工;（2）通过开发络合介导的聚合物复合材料，探索与先进聚合物和聚合物复合材料加工相关的工程问题。 用于商业加工技术如旋涂、薄膜挤出和纤维纺丝的加工方法;和（3）评价通过这种加工方法生产的薄膜、涂层、纤维和其它形式的形态和物理性能，从而阐明加工和形态对先进聚合物和聚合物复合材料的机械、电子、光学和光电性能的影响。